<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

  <style>
    h1{
      color: red;
      color: #ff0000;
      color: #00ff00;
      color: #0000ff;
      color: #f00;
      color: #0f0;
      color: #00f;
      color: rgb(255,0,0);
      color: rgba(19, 19, 19, 1);
    }
    #d1{
        background-color: gray;
        width: 400px;
        height: 300px;
        background-image: url("../a.webp");
        background-size: 200px 150px;
        background-repeat: no-repeat;
        background-position: 50% 50%;
        background-position: 100px 62.5px;
    }
    #d2{
        background-color: #e8e8e8;
        width: 611px;
        height: 376px;
        background-image: url("http://doc.canglaoshi.org/tstore_v1/images/itemCat/study_computer_img1.png");
        background-size: 318px 319px;
        background-repeat: no-repeat;
        background-position: 90% 80%;
    }
  </style>
</head>
<body>
<div id="d1"></div>
<div id="d2"></div>
<h1>颜色测试</h1>
</body>
</html>